Recently a site displayed a set of drawings for a Mauser manufactured Springfield 1903 actioned Sporting rifle.
Apparently some US shooters had tried to interest Mauser in producing these rifles for the US market.

The drawings show a very nicely done rifle mixing European and American styling.

I'll have to check on the details but I think Townsend Whelen was mentioned as being one of those who'd tried to get the ball rolling on this.